Spark-plug.



P. T. GAUUER.

SPARK PLUG.

APPLICATION FILED NOV. 22, 1916.

Patented Nov. 13', 191?.

MWfiff f 65.41776 PEER; E 1. GAUTIIEE, Q3? LGUBIE,

Applica'cion filed November To (ZZZ whom it may concern:

Be it known that 1', Pnczzm; T. GAUTER, a. citizen of the United Sissies of America, a resident of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Spark-Pliigs, of which the following is a full, clear, and exact description, reierence being had to the accon'ipanyin drawing, forming a. past of this specification.

My invention reiases to a spark plug *1 use upon iniernai combustion engines, and it has for its object to provide sin pl.- means constituting a part of piuq whereby the user may quickly and positively determine the delivery or non-deiivery of an electric current to the ping. Eriefiy stated, the invention consists in zii'ienging a switch between the electrical conductor receiving poi'i'ion of a spark plug one the electrodes of the plug, said switch a component of the plug @116. capable o oviding indication of an electric onzreni.

spark ping due to sparking when the swi'lc is cit-her opened or ciose Figure I is a side elevation of my soar piug.

Fig. 11' is a vertical section through lug.

Fig. H1 is a top View of the plug.

Fi IV is a crow section taken on iine IV-1V, Fig. I

In the drawings:

1 designates the ouier eiectrocie which is preferably 01 the usual form incinding presence of a. screw thread 21d L m3 conmeet the spark plug to the cylinder of er-zplosive engine.

2 is an insulator monn'tecl in the ones? trod-e 1 and secnrecl thereto by e. i bushing 3. All of these pflYiiS may be i any usual form as no invention pee se is herein claimed for them.

4 desi nmbes an inner elecii'ofie mounted in the iElSllTfitOl? 2, but extenoiing only part We therethrough from the inner and of seiri insula tor. i is a stem sesteol in the onset and of the insulator 2 and separated from the inner electrode The stem 5 is prefer- Specification of 1 sh" a, sin.

screw threaded 0 receive a Zsindii. Winch serves 0 secure a eonziuoiing "i" the spark plug.

Amid esi the terminal meanness f a sviizch. through the meeiium of which mssegc of an electric cnrz'eni, from icm 5 to one the elecfii'odes of "he is eontrolied. in she form of switch If shown izhe member-3 A is disilcai midi fits o. the onier end of the inSiL the swish meniiiei 3 is in the znri which encircles the insu. mnnecieai in the inner elecii'oii siding ""nsve sely tlimuizl .ilaior the inner eiec heed in circuit i). each other s}; not bar 8, which is pivoteel o e .ieinbeis and is movable to and 1 Jan 0%. elements cnrrieci by she oi ne member, as id new being preferably orovicieoi i'aiifia i die 5). by whieh may no opening. 6 will apparent that when my is 111 service, and the switoli s 1 ,316 current delivered s spoilt shew-to i ileiivcr ling.

six-own sen-cl i J eonzpris n n e ecsrooe ans a consumer-renal be h nimmtezl sols". insiiiato each other by e poiiion o s. itcn conneotmg seici else-- trade and I n iuoz rsceiving menfimr; said switch ha 11" separabia contact portions 92- pose l to View gxteriorly of the spark plug.

:2. A comprising an insulator, an alias oda mountad in 521d insulatQr, a switch band; iii-ed i0 saifl insulator and ham 111g cozmactisn wilwh fileotzade, a switch member 11 said insulafior, wnducmr receiving member in the outer end of said insulator adjacent t the last mentioned 10 switch member, and circfiit breaking switch element interposefi between said switch member and said switch band all of said switch members being components of the spark plu PIERRE T. GAUTIER. 

